BS 7856:2013 pdf free

BS 7856:2013 pdf free.Code of practice for special design and other features of alternating current watthour meters for active energy(MID accuracy classes Aand B) for use in the UK.
BS 7856 gives recommendations for special design and otherfeatures of newly-manufactured alternating current watthour meters withratings up to and including 100 Almax for installation in domestic and smallcommercial/industrial premises within the United Kingdom.
Normative references
The following referenced documents are indispensable for the application ofthis document.For dated references, only the edition cited applies. For undatedreferences, the latest edition of the referenced document (including any
amendments) applies.
BS 6004:2012,Electric cables – PVC insulated and PVC sheathed cables forvoltages up to and including 300/500 v, for electric power and lighting
BS 7647,Radio teleswitches for tariff and load control
BS EN 50470-1:2006,Electricity metering equipment(a.c.) – Part 1: General requirements, tests and test conditions – Metering equipment (class indexes A,Band C)
BS EN 50470-2，Electricity metering equipment(a.c.)- Part 2: Particularrequirements – Electromechanical meters for active energy (class indexes Aand B)
BS EN 50470-3:2006,Electricity metering equipment (a.c.) – Part 3: Particularrequirements – Static meters for active energy (class indexes A, B and C)
BS EN 62052-21,Electricity metering equipment (a.c.) – General requirements,tests and test conditions – Part 21: Tariff and load control equipment
BS EN 62055-31:2005,Electricity metering – Payment systems – Part 31: Particularrequirements – Static payment meters for active energy (classes 1 and 2)
IEC 60502-1,Power cables with extruded insulation and their accessories forrated voltages from 1 kV (Um = 1,2 kV) up to 30 kv (Um = 36 kV)-Part 1: Cables for rated voltages of 1 kv(Um = 1,2 kV) and 3 kv(Um = 3,6 kV)
Terms and definitions
For the purposes of this British Standard the terms and definitions given inBS 7647,BS EN 50470,BS EN 62052-21,BS EN 62055-31 and lEC 60502-1 appl
Mechanical features
4.1 For a single-phase, two-wire meter:
a) the overall dimensions of the meter and spacing of fixing holes should be in accordance with the appropriate values given in Table 1; and
b) the dimensions and spacing of the terminal should be in accordance with the appropriate values given in Table 1 and shown in Figure 1.
For polyphase meters, the current terminals of directly-connected meters havingrated currents up to and including 100 A should be in accordance with
dimensions K,L and P given in Table 1.
For any current terminal, into which a correctly prepared cable conforming toBS 6004:2012,8181Y, of down to 16 mm2 is inserted, no visible conductivematerial should be exposed.BS 7856 pdf free download.